Rock crusher and pulverizer.



c. 0 MICHAELSENQ BOOK CRUSHER AND PULVERIZER.

APPLICATION FILED JUNE 25. NH].

Patented Mar. 18, 1919.

3 S.HEETSSHEET I.

M m LLWL CHAS. O. MICHAELSEIN, El-mentor.

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C. O. MiCHAELSEN,

ROCK HUSHER AND PULVERIZER.

g Q I P APPLICATION FILED JUNE 25. i917- L-M l $8 Pawmed Mar. 18,1919.

3 SHEETS SHEET 2- CHAS. O. MICHAELSEN, E-wuwtoz.

0. 0. MICHAELSEN ROCK'CRUSHER AND FULVERiZER.

APPLICATION FILED IUNE 25.1917

1,297,385. Patented Mar. 18,1919.

3 SHEETS-SHEET 3.

IPIIIIIIIJIVZAY CHAS. O. MIcHAELsEN, imwfozr attoznoq,

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UNITED STATES PATENT oFFion.

CHARLES 0. MICHAELSEN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, B Y MESNEASSIGNMENTS, '10 MTOHAELSEN MACHINERY COMPANY, A CORPORATION OF NEVADA.

ROCK CRUSHER AND PULVERIZER.

Patented Mar. 18, 1919.

Application filed June 25, 1917. Serial No. 176,840.

To all whom it may concern:

Be it known that I, CHARLES 0. MICHAEL- sEN, a citizen of the UnitedStates, and a resident of Minneapolis, in the county of oscillating jawsadapted to crush and 'abrade material inclosed between them. It is theobject of my invention to provide a compact, powerful and durablemachine of this kind, having a large capacity in proportion to its size,adapted to receive moderate sized pieces of rock or ore, to reduce thesame to a fine pulverulent product, and having actuating mechanism soconstructed and arranged that the required actuating force issubstantially constant notwithstanding the intermittent or reciprocatoryaction of the crushing and pulverizing mechanism. A further object of myinvention is to .provide a driving or actuating mechanism in which thecontacting moving parts receiving the greatest pressures have surfaceswhich roll upon each other and thereby avoid the friction of rubbing orsliding and the excessive wear which would result therefrom. A furtherobject of my invention is to provide simple and effective means fortaking up or compensating wear of the rolling contact-surfaces withoutaltering the operative relation of the parts.

In the accompanying drawings Figure 1 is a side view of a machineembodying my invention, Fig. 2 is a longitudinal vertical section of thesame, Fig. 3 is a transverse vertical section thereof taken through theaxis of the driving shaft, Fig. 4 is a detail horizontal section throughone of the con.- necting links for the lower ends of the oscillatingjaws, and Fig. 5 is a diagrammatic side view showing details of a partof the rocking-lever and the co-acting part of one of the oscillatingjaws.

In the construction of the machine illustrated in the drawings, I employtwo main side-frames 6 which are connected to each other and held inparallel and spaced relation by ribbed end-pieces 7 secured thereto bybolts 8. In the upper part of the sideframes 6 at the center thereof areformed bearings for the transversely extending drive-shaft 9 whichcarries at its ends, outside the frame, a fly-wheel 10 and drivepulley11, the latter being connected by belt with a suitable source of powerso as to .be driven at a uniform rate when the machine is in operation.Secured on the shaft 9 inside the bearings thereof are two pinions 12which mesh with large gears 13 mounted on a shaft 14 disposed beneathand parallel with the shaft 9 and having its end-portions suitablyjournaled in the side-frames. On the central portion of said shaft 14intermediate the gears 13 there is an eccentric 15 which fits revolublywithin the cylindrical transverse bore of a box 16 of approximatelycubical external form. Said box 16 fits sli d ably between the forked'lower endportions 17 of a rocking-lever 18, the upper end of which fitspivotally upon the central portion of the main drive-shaft 9 between thepinions 12. The ends of the forked portions 17 of the rocking-lever areconnected by bolts 19, passing through the same as shown. In oppositesides of the upper or hub-portion of the rocking-lever there are groovesor channels for receiving projecting parts of the oscillating jaws andactuating the same as will be hereinafter described.

The oscillating jaws are provided in pairs at each end of the machineand, being alike at each end, may be described with reference only toone pair thereof. The outer jaw 20 is carried by a transverse shaft 21of which the end-portions have a pivotal bearing in boxes 22 arranged inhorizontally extending guideways in the side-frames 6. The boxes 22 areretained in adjusted positions in the guideways by means ofspacing-plates 23 disposed between the outer ends thereof and theframe-end-pieces 7, and threaded spacing-rods 24 provided with nuts 25and arranged between the inner ends of the boxes and the adjacent endsof the guideways as shown. The inner jaw 26 is carried by a transverseshaft 27 of which the end-portionshave a pivotal bearing in eccentricbushings 28 disposed rotatably in openings therefor through theside-frames 6, the

bushings being held in adjusted relations to which the inner sides areformed by sald plates 32 and the outer sides are formed by plates 33removably attached to the outer i sides of the frame. At the left ofFig. 1 the by means of an open rectangular link 34 fitting around boxes35 and 36 disposed V spacing-block'37, a plurality of plates 38 and 36may be made by transferring some of plate 33 is omitted to show theshaft-ends and connecting-link Within the chamber. At each side of themachine the shafts 30 and 31 are pivotally connected to each other aboutthe shafts, said boxes being held in spaced relation to each other bymeans of a and wedge-plates 39, arranged between the boxes as shown inFig. 4. The wedge-plates have end-flanges which overhang the ends of theboxes, being connected therewith by screws 40 so that they may be drawninwardly by said screws. Tensile stresses be tween the shafts arereceived by the links 34, and compressive stresses are received by thespacing-parts 37, 38 and 39. Adjustments of the axial spacing of theboxes 35 the plates 38 from positions between the boxes and block 37 topositions between the boxes and the ends of the links 34.

The adjacent sides of the jaws 20 and 26 are provided with renewablefacing-plates or blocks 41, 42, 43 and 44 secured thereon as shownclearly in Fig. 2, the adjacent faces of the lower blocks 41 preferablybeing almost in contact but diverging slightly at their upper edges, andthe blocks 43 being thinner than the adjoining blocks 42 and 44, to forman enlarged spaceor pocket, wider than the throat between the upperblocks 44. The upper ends of the aws have arcuate faces 45 and 46,concentric respectively with the shafts 21 and 27, and above saidarcuate ends there are arranged the converging sides of a feed-hopper 47by which materials are directed into the space between the pair of aws.

From the upper end of the inner jaw 26 at the back thereof an integralarcuate portion 48 extends concentrically with the pivot-shaft 27 andjoins the upper part of an arm 49 which extends radially of said shafttoward the shaft 9. At the end of said arm 49 a lug or tooth 50 projectsbeyond the upper 'face of the arcuate connecting portion 48,, said lugor tooth extending into the before-mentioned axial groove in theadjacent side of the hub portion of the rocking-lever 18. The upper andlower sides 01' faces aa of the lug or tooth 50 are shaped to conformwith involute curves generated upon a base-circle A, indicated in Fig.5, and the corresponding faces b-b of the groove or channel in the hubof the rockinglever are likewise shaped to conform with involute curvesgenerated upon a base-circle B, also indicated in said Fig. 5. Therespective involute faces ab and ab contact with each other, and duringpivotal movement of the rocking-lever 18 and jaw 26 about the respectiveaxes of the shafts 9'and" 27 said pairs of involute faces roll upon eachother without rubbin or sliding, within the limits of their arcs ofcontact. Thus movements of the rocking-lever are transmitted to the jaw26 as though said parts were provided with cylindrical surfacescorresponding to the pitch-circles C and Din ig. 5, and said surfacesrolled upon each other without slipping. Now a peculiar property ofinvolute surfaces, when contacting as described, is that the distancebetween the cen ters of rotation may be varied withouteither interferingwith the rolling of the surfaces upon each other, or changing therelative rates of movement of the actuating and actuated parts. Inconsequence of this peculiarity, it is practicable to move the center ofthe shaft 27 toward or away from the center of the shaft 9, to therebyadjust the involute working faces to a proper relation to each other,either initially or to compensate wear after use; and the eccentricbearing-bushings 28 are provided for this purpose.

Owing to the link connections between the A ends of the shafts 30- and31, the oscillating movements of the lower ends of the jaws 20 and 26are equal in amount and alike in direction, and the space between thelower facing-blocks 41 remains substantially uniform throughout themovement, the working faces merely moving oppositely to each other inapproximately parallel planes so as to rub and abrade the materialbetween them without compressing or crushing said material. The entireworking faces of the jaws have a like rubbing movement relatively toeach other, but in addition thereto the upper por tions of the jaws movetoward and away from each other so as to exert a crushing pressure uponthe material between them during the periods of closure. The closure ofthe upper parts of the j aws. results principally from the dispositionof the shaft 21 at'a higher level than the shaft 27, so that beunderstood that the corresponding parts at. the other ends of themachine, designated by like reference numerals with prime indices addedthereto, are substantially a duplication of the described parts. It willbe noted,uhowever, that the closing move ment of each set of the jawsoccurs as the rocking-lever 18 is moved by the eccentric 15 toward therespective end of the machine, and that the closure of the jaws atopposite ends of the machine thus occurs alternately. It will be obviousthat during the closing movement of either pair of jaws, when theworking space between the jaws is filled with rock or the like, agreater actuating force will be required for the respective jaws thanthat for causing the movement thereof in the opposite direction, duringwhich their movement is retarded only by the rubbing of the materialbetween them and mainly in the lower part of the working-space. Owing tothe alternate closing of the pairs of jaws, however, the requiredactuating force is substantially uniform, being the same during eachhalf-revolution of the eccentric-shaft 14. The resistance offered by oneset of jaws during the closing movement of the other set tends tobalance the pressure upon the pivot-bearing of the rocking-lever, andsaid bearing-pressure is thus constantly less than it would be if eitherset of the jaws were being actuated alone.

It will be apparent that my invention provides a powerfulleverage-system for actuating the crushing and pul'verizing mechanism;that owing to the incorporation of the two sets of oscillating jaws withthe intermediately arranged actuating mechanism the machine will have alarge working capacity proportional to its size and that a substantiallyconstant actuating force will be required notwithstanding theintermittent action of either single unit of the crushing andpulverizing devices. It will be noted further that by the use of thedescribed in volute contacting surfaces of the actuating parts receivingthe greatest pressures, whereby said surfaces roll upon each otherinstead of sliding or rubbing, there is a marked saving of frictionlosses in the transmission of the power; and also that adjustment of the7 parts to a proper working relation is greatly facilitated, requiringmerely the turning of the eccentric bushings 28.

Now, having described my invention, what I claim and desire to secure byLetters Patent is:

1. In a machine of the class described, a pivotally mounted oscillatingmember having a part extending radially of the pivotal axis and providedwith involute faces, a pivoted rocking-lever having involute facesengageable with the faces of said part of the oscillating member to rollthereon during simultaneous pivotal movement of the lever and saidmember, means for actuating the rocking-lever, and adjusting means forvarying the spacing between centers of the oscillating member androcking-lever.

:2. In a machine of the class described, pivoted oscillating members, apivoted rocking-lever disposed intermediate said mem bers, means foroscillating said rockinglever about its pivotal axis, and curvilinearsurfaces on said rocking-lever and on parts of said members, saidsurfaces adapted to engage and roll upon each other during simultaneouspivotal movement of the rocking-lever and members about their respectiveaxes.

3. In a machine of the class described, oscillatable members pivotallymounted on parallel spaced axes, a driving-shaft and an eccentric shaftdisposed intermediate said members parallel with the axes thereof,gearing connecting said driving-shaft and eccentric-shaft, arocking-lever pivoted on the driving-shaft and having a forked portionstraddling the eccentric-shaft, an eccentric on said shaft for actuatingthe rockinglever, and means connecting the rockinglever and saidoscillatable members whereby the latter are similarly moved duringalternate half-revolutions of the eccentric-shaft.

4. In a machine of the class described, members pivoted on spacedparallel axes, a rocking-lever pivoted on an axisintermediate andparallel to the axes of said members, means for oscillating saidrockinglever about its pivotal axis, interengaging involute-faced partson said rocking-lever and said members adapted to communicate movementof the former to the latter, and adjusting means for moving the axes ofthe oscillating members toward and away from the rocking-lever axes.

5. In a machine of the class described,

members pivotally mounted on spaced parallel axes, a driving-shaft andan eccentricshaft disposed intermediate and axially parallel with saidmembers, gearing connecting said driving-shaft and eccentric-shaft, arocking-lever pivoted on the driving-shaft and having a forked portionstraddling the eccentric-shaft, an eccentric on said shaft, a box onsaid eccentric and slidable within the forked portion of therocking-lever, and interengaging involute-faced parts on the pivotedmembers and on said rocking-lever adjacent to the pivotal axis thereof,said parts adapted to roll upon each other to communicate movement ofthe rocking-lever to the pivoted members.

6. The combination in a machine of the class described having pivotedmembers movable about parallel axes and each coacting with anothermember to crush materials between them during movement in one direction,of actuating means disposed intermediate said pivoted members foroscillating eccentric-shaft, and means on the pivoted the same abouttheir pivotal axes and. immembers engaging parts of' said rockingpartingcrushing movement thereto alterlever, said means and said parts of therock- 10 nately, said actuating means comprising a 1ng-lever havingcurvilinear engaging sur- 5 drive-shaft, an eccentric-shaft, gearingconfaces adapted to roll upon each other durneoting said shafts, arocking-lever pivoted ing pivotal movements of the members;

on the driving-shaft and actuated by the CHARLES O. MICHAELSEN:

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Yatents, Washington, D. 0. V l 1

